A = (-1, 4)
B = (2, 4)
C = (4, 1)
D = (4, -2)
E = (2, 0)
F = (0, 1)
G = (0, 3)
poly1, a, b, c, d, e, f, g = Polygon(A, B, C, D, E, F, G)
H = (5, 6)
I = (5, -5)
h = Segment(H, I)